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1、人教版高中英语课件：unit 13 interating skillsSkim and find out Skim and find out the main top sentencesthe main top sentences Task oneActivity 1.Finding Topic Sentences Topic Sentence of Paragraph:_Sentence:As the oceans are the source of life on earth,As the oceans are the source of life on earth,the estuari
2、es are our planets nurseries.the estuaries are our planets nurseries.Topic Sentence of Paragraph:_Sentence:Estuaries are great places for natures young ones.Estuaries are great places for natures young ones.Topic Sentence of Paragraph:_Sentence:Estuaries are also important because they absorb Estuar
3、ies are also important because they absorb nutrients and pollutants from water coming from nutrients and pollutants from water coming from inland sources,thus cleaning our water.inland sources,thus cleaning our water.Topic Sentence of Paragraph:_Sentence:Estuaries provide both recreation and educati
4、on Estuaries provide both recreation and education for human beings.for human beings.3 32 24 41 1Activity 2.Structure of the passage 1 12 24 43 31 12 24 43 31 12 23 34 4Q1:Because the habitat provides all the benefits of the ocean(energy and nutrients)without the dangers(waves and storms).Q2:“Densit
5、y“means the number of species per area in this passage.Q3:Estuaries absorb nutrients and pollutants from water coming from inland sources,thus cleaning our water.Q4:Since estuaries act as filters,many pollutants end up in the estuaries.Q5:Estuaries are important to human beings because we like to st
6、udy and relax in them and because they contribute to the economy through tourism and fishing.Task three:Write your own paragraphsWrite your own paragraphsTopic:_Step 1:Step 1:Step 2:Step 2:Step 3:Step 3:What will happen to a piece of metal if you put it in water?Describe what happensDescribe the cau
7、ses and effects The conclusionSample writing:Sample writing:If a piece of metal,or any other object is put in water,it will dissolve.Because the water molecule is made up of one oxygenand two hydrogen atoms.It is polar,that is,it has a slightly negative and a slightly positiveend.The two ends make it possible for waterto break down both solids and gases.So a piece of metal will dissolve when it is put inwater.